Ara es mostren els items 1-18 de 18

    • A data-driven wall-shear stress model for LES using gradient boosted decision trees 

      Radhakrishnan, Sarath; Adu Gyamfi, Lawrence; Miró Jané, Arnau; Font García, Bernat; Calafell Sandiumenge, Joan; Lehmkuhl Barba, Oriol (Springer Nature, 2021)
      Text en actes de congrés
      Accés obert
      With the recent advances in machine learning, data-driven strategies could augment wall modeling in large eddy simulation (LES). In this work, a wall model based on gradient boosted decision trees is presented. The model ...
    • Active flow control for three-dimensional cylinders through deep reinforcement learning 

      Suárez Morales, Pol; Alcántara Ávila, Francisco; Miró Jané, Arnau; Rabault, Jean; Font García, Bernat; Lehmkuhl Barba, Oriol; Vinuesa Moltiva, Ricardo (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Text en actes de congrés
      Accés obert
      This paper presents for the first time successful results of active flow control with multiple independently controlled zero-net-mass-flux synthetic jets. The jets are placed on a three-dimensional cylinder along its span ...
    • Deep reinforcement learning for flow control exploits different physics for increasing Reynolds number regimes 

      Varela Martínez, Pau; Suárez Morales, Pol; Alcántara Ávila, Francisco; Miró Jané, Arnau; Rabault, Jean; Font García, Bernat; García Cuevas, Luis Miguel; Lehmkuhl Barba, Oriol; Vinuesa Moltiva, Ricardo (Multidisciplinary Digital Publishing Institute (MDPI), 2022-12-02)
      Article
      Accés obert
      The increase in emissions associated with aviation requires deeper research into novel sensing and flow-control strategies to obtain improved aerodynamic performances. In this context, data-driven methods are suitable for ...
    • DNS and POD analysis of separated flow in a three-dimensional diffuser 

      Miró Jané, Arnau; Eiximeno Franch, Benet; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol (Springer, 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A DNS of a three dimensional diffuser has been performed with the in-house solver Alya. The resulting dataset presents a good agreement with existing numerical and experimental data, even without smoothing of the sharp ...
    • Flow and heat transfer of impinging synthetic jets 

      Miró Jané, Arnau (Universitat Politècnica de Catalunya, 2019-06-19)
      Tesi
      Accés obert
      Synthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing fluid to enter and leave through a small orifice. This results in a net jet that is able to transfer kinetic energy and momentum ...
    • Flow separation in airfoils with rough leading edges 

      Kumar, Vishal; Miró Jané, Arnau; Lehmkuhl Barba, Oriol; Piomelli, Ugo (2023-05)
      Article
      Accés obert
      In this study we consider the flow over airfoils with leading-edge roughness, designed to mimic the ice depositions that may occur on an aircraft in flight. The focus of this investigation is the effect of the angle of ...
    • Flow topology and heat transfer analysis of slotted and axisymmetric synthetic impinging jets 

      Miró Jané, Arnau; Soria Guerrero, Manel; Cajas García, Juan Carlos; Rodríguez Pérez, Ivette María; Moulinec, Charles (2021-06)
      Article
      Accés obert
      This work is focused on exploring the flow and heat transfer capabilities for slotted and axisymmetric cavity configurations for synthetic impinging jets; the jet is enclosed between two isothermal parallel plates, impinging ...
    • HGS user manual 

      Soria Guerrero, Manel; Fuster, Caleb; Miró Jané, Arnau (Universitat Politècnica de Catalunya, 2022-10-01)
      Apunts
      Accés obert
    • Impact of interannually variable diffuse attenuation coefficients for downwelling irradiance on biogeochemical modelling 

      Terzic, Elena; Stefano, Salon; Cossarini, Gianpiero; Solidoro, Cosimo; Teruzzi, Anna; Miró Jané, Arnau; Lazzari, Paolo (2021-05)
      Article
      Accés obert
      Remotely sensed optical data are fundamental to be integrated into biogeochemical models, since the key role of the optical properties on lower trophic dynamics. In this paper, it is shown how ocean optics satellite products ...
    • NFP user manual 

      Soria Guerrero, Manel; Fuster, Caleb; Miró Jané, Arnau (Universitat Politècnica de Catalunya, 2022-10-01)
      Apunts
      Accés obert
    • On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition 

      Eiximeno Franch, Benet; Miró Jané, Arnau; Cajas García, Juan Carlos; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María (Multidisciplinary Digital Publishing Institute (MDPI), 2022-09-02)
      Article
      Accés obert
      The coherent structures and wake dynamics of a two-degree-of-freedom vibrating cylinder with a low mass ratio at Re=5300 are investigated by means of proper orthogonal decomposition (POD) of a numerical database generated ...
    • Radiative transfer modeling with BGC-Argo float data in the Mediterranean Sea 

      Terzic, Elena; Miró Jané, Arnau; Organelli, Emanuele; Kowalczuk, Piotr; D'Ortenzio, Fabrizio; Lazzari, Paolo (Wiley, 2021-10-04)
      Article
      Accés obert
      A radiative transfer model was parameterized and validated using Biogeochemical Argo float data acquired between 2012 and 2017 across the Mediterranean Sea. Fluorescence-derived chlorophyll urn:x-wiley:21699275:media:jgr ...
    • Self-induced large-scale motions in a three-dimensional diffuser 

      Miró Jané, Arnau; Eiximeno Franch, Benet; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol (Springer, 2023-09-14)
      Article
      Accés obert
      A direct numerical simulation of a three-dimensional diffuser at Reynolds number Re = 10,000 (based on inlet bulk velocity) has been performed using a low-dissipation finite element code. The geometry chosen for this work ...
    • Study of advanced materials for thermal insulation in the inner Solar System 

      Miró Jané, Arnau (Universitat Politècnica de Catalunya, 2014-09)
      Projecte/Treball Final de Carrera
      Accés obert
      Space harsh environmental condition often calls for an adequate thermal regulation and insulation. In this thesis, a thermal model for a greenhouse in Mars is presented. Its objectives are to achieve and maintain suitable ...
    • Towards a machine learning model for explicit algebraic Reynolds stress modelling using multi-expression programming 

      Miró Jané, Arnau; Wallin, Stefan; Colombo, Alessandro; Temmerman, Lionel; Wunsch, Dirk; Lehmkuhl Barba, Oriol (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Text en actes de congrés
      Accés obert
      A novel framework for a 5-term explicit algebraic Reynolds stress model has been proposed, which is suitable for machine learning procedures. Under this framework, high-fidelity datasets have been explored and post-processed. ...
    • Towards a quantitative understanding of Robert's Rising Thermal Bubble as a benchmark for 3D atmospheric codes 

      Andrés Carcasona, Marc; Soria Guerrero, Manel; García Melendo, Enrique José; Miró Jané, Arnau (American Meteorological Society, 2023-02-01)
      Article
      Accés obert
      Robert’s rising thermal bubble (RRTB) is a benchmark case used to assess atmospheric models. In this paper, RRTB is further studied both using an analytical and a numerical approach, improving to a greater extent the ...
    • Towards Data Driven Models for the Automotive Industry 

      Eiximeno Franch, Benet; Miró Jané, Arnau; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This study employs proper orthogonal decomposition to identify flow patterns linked to yaw angle variations in the Windsor body. A reduced order model is proposed to accurately predict variations in back pres- sure at ...
    • Turbulent boundary layer in a 3-element high-lift wing: coherent structures identification 

      Montalà Sales, Ricard; Eiximeno Franch, Benet; Miró Jané, Arnau; Lehmkuhl, Oriol; Rodríguez Pérez, Ivette María (Springer, 2023)
      Capítol de llibre
      Accés restringit per política de l'editorial
      A large eddy simulation (LES) of the flow past a 30P30N high-lift three-element wing is performed at the angle of attack AoA = 9º and a Reynolds number of Re = 750,000, based on the nested chord. Results are validated ...